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Re: Yeast CO2 Stopped.

It seems that the never-ending question regarding yeast CO2 is why it is 
not lasting very long.  CO2 should last at least 3 to 4 weeks.  If it 
is not, you can check the following:

1.  Yeast can go bad.  Store open yeast in the fridge to help prolong 
its life.

2. wrong type of yeast.  Don't use rapid-rise yeast.  Use the 
traditional type.

3. leaks. I use hot melt glue and I put quite a bit on to help stop 
leaks.  Check for leaks by putting some water around any areas that 
can leak.  You will see bubbles or hear hissing at any leak.

4. Low pH.  Adding some baking soda can help buffer your water.

To make my CO2 batches, I use a 2l pop bottle, fill it about a third full 
of warm water, add 2 cups of sugar, a tsp of baking soda, and shake it 
thoroughly until everything is dissolved.  I fill the bottle up to 
about 2/3 full with cold water, and then add a small amount of yeast 
(1/4 to 1/2 tsp of yeast).  I have had batches last up to about 6 
weeks (although they were not producing much by then).

- Darrell